On Thu, Aug 27, 2009 at 04:14:39PM -0400, Linda Messerschmidt wrote: > On Wed, Aug 26, 2009 at 4:42 PM, John Baldwin<j...@freebsd.org> wrote: > > One thing to note is that ktrace only logs voluntary context switches (i.e. > > call to tsleep or waiting on a condition variable). It specifically does > > not > > log preemptions or blocking on a mutex, > > I was not aware, thanks. > > > so in theory if your machine was > > livelocked temporarily that might explain this. > > How would we determine that? > > We are now able to reproduce this on a test machine, even after > slipping in a 7.2-STABLE kernel with KTR enabled. So we have a lot > more options now. > > Unfortunately, I don't really "get" KTR yet. It looks like it has > relevant info, but I was unable to correlate its huge timestamps (e.g. > 6795522404430562) to ktrace output times (e.g. 1251387606.225544) > showing problem areas. > > What's my best bet from here?
How much memory is installed ?
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